CN210294681U - Zoom electronic eyepiece adapter for infinite conjugate distance microscope - Google Patents
Zoom electronic eyepiece adapter for infinite conjugate distance microscope Download PDFInfo
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- CN210294681U CN210294681U CN201921362081.4U CN201921362081U CN210294681U CN 210294681 U CN210294681 U CN 210294681U CN 201921362081 U CN201921362081 U CN 201921362081U CN 210294681 U CN210294681 U CN 210294681U
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Abstract
The utility model discloses a zoom electron eyepiece adapter for an infinite conjugate distance microscope, which is characterized in that a cylindrical lens, a steering prism and a zoom system are arranged between the exit pupil of a microscope objective and an image sensor in sequence, and an infinite light beam emitted by the microscope objective is imaged on the image sensor after passing through the cylindrical lens, the steering prism and the zoom system; the zooming system comprises a fixed group, a zooming group and a compensation group which are arranged along an optical axis, and the distance between the fixed group and the zooming group, and the distance between the fixed group and the compensation group are adjustable, so that the continuous zooming function is realized. The utility model discloses passing through the infinitely distant light beam of microscope objective outgoing and forming images on image sensor, being further handled or saving the digitization in order to realize the microscopic image by the treater, need not to change the adapter and just can match not unidimensional image sensor, still can be applied to the infinitely distant microscope of different brands, realize maximum commonality.
Description
Technical Field
The utility model belongs to the technical field of the electron eyepiece, especially, relate to an infinite conjugate is zoom electron eyepiece adapter for microscope.
Background
For an infinite conjugate distance microscope, if it is desired to convert its optical image into a digital image, the current practice is: 1. directly placing the image sensor on the image surface of the microscope tube lens (1 x), and 2, zooming the tube lens image through the eyepiece adapters with different fixed magnifications to match the image sensors with different sizes.
The first method, although simple in structure, has a magnification of only 1 ×, and when the image sensor is relatively large in size, the received video has a shadow area; when the size of the image sensor is small, the range of the received video field is small. The size of a standard intermediate image formed by a mainstream infinite conjugate distance microscope in the market at present is 18-24mm, the size of an imaging area of a common image sensor is small, even if the diagonal length of the image sensor of 1 inch is 16mm, if the sensor is directly placed on an image surface of a cylindrical mirror, all images cannot be acquired.
The second method is to use electronic eyepiece adapters of different fixed magnifications to match image sensors of different sizes.
Chinese patent publication No. CN201344999Y discloses a 30-fold electronic eyepiece of an optical microscope, which includes an eyepiece barrel and a receiving barrel connected in sequence, wherein the front end of the eyepiece barrel is provided with an eyepiece lens I, the rear end of the eyepiece barrel is provided with an eyepiece lens II, an image sensor chip is arranged inside the receiving barrel, and the device can amplify a target by 30 times through the arrangement of the eyepiece lens I and the eyepiece lens II.
Chinese patent publication No. 201945742U discloses a universal electronic eyepiece device, which includes a device main body, a field lens mounted on the main body, an image sensor located on an imaging surface of the field lens, an image sensor driving module for driving the image sensor, a power supply module, an image signal converter, a display screen device, and an image signal output module, the main body is further provided with a universal eyepiece sleeve detachably sleeved outside the eyepiece, and the universal eyepiece sleeve is provided with an eyepiece locking mechanism. The device makes the eyepiece connector can refute the optical eyepiece of multiple model and can directly use the optical eyepiece that has the eyepiece instrument to realize its multipurpose, multi-functional purpose.
However, the electronic eyepieces have the problems that the adapter is inconvenient to replace and the cost is high in the using process.
Therefore, as the size of the image sensor chip increases, the existing microscope eyepiece adapter obviously has inconvenience and defects, and a new adapter is urgently needed to match with the sensors with different sizes.
SUMMERY OF THE UTILITY MODEL
To the above-mentioned problem that prior art exists, the application provides an infinitely distant conjugate is zoom electron eyepiece adapter for microscope, need not to change the adapter just can match the image sensor of not unidimensional.
The technical scheme of the utility model as follows:
a variable power electronic eyepiece adapter for an infinite conjugate distance microscope is characterized in that a cylindrical lens, a steering prism and a variable power system are sequentially arranged between an exit pupil of a microscope objective and an image sensor, and an infinite light beam emitted by the microscope objective passes through the cylindrical lens, the steering prism and the variable power system and then is imaged on the image sensor;
the zooming system comprises a fixed group, a zooming group and a compensation group which are arranged along an optical axis, and the distance between the fixed group and the zooming group, and the distance between the fixed group and the compensation group are adjustable, so that the continuous zooming function is realized.
The utility model discloses an electron eyepiece adapter passes through the infinity light beam of microscope objective outgoing and images on image sensor through the battery of lens, is further handled or saves the digitization in order to realize the microscopic image by the treater. The continuous zooming function can be realized by changing the distance between the fixed group and the zooming group and the distance between the fixed group and the compensation group, and the same adapter can be matched with image sensors with different sizes. Through the multiple arrangement of the distances between the cylindrical lens and the image rotating prism and between the image rotating prism and the fixed group, the adapter can be applied to infinite microscopes of different brands, and the universality of the maximum degree is realized.
The utility model discloses in, become doubly group, fixed group and compensation group relative position on the optical axis can have multiple form, according to permutation and combination, can have six relative position relations.
Preferably, the variable magnification group is arranged between a fixed group and a compensation group, the fixed group is close to the steering prism, and the compensation group is close to the image sensor; at the moment, the focal length value range of the cylindrical mirror is 165.0-200.0 mm, the focal length range of the fixed group is-90-60 mm, the focal length range of the zoom group is 50-70 mm, and the focal length range of the compensation group is 60-90 mm
The lens components of the variable power group, the fixed group and the compensation group have various combination forms on the premise of meeting the focal length range, and the following combination form has better effect:
the fixed group comprises a first lens and a second lens, wherein the object plane side of the first lens is a convex surface, the image plane side of the first lens is a concave surface, the concave surface of the first lens is cemented with the convex surface of the second lens, and the first lens is close to the object plane side;
the zoom group comprises a third lens, a fourth lens and a fifth lens, and the third lens is close to one side of the object plane; the object plane sides and the image plane sides of the third lens and the fourth lens are convex surfaces, the object plane side and the image plane side of the fifth lens are concave surfaces, and the convex surface of the fourth lens is glued with the concave surface of the fifth lens;
the compensation group comprises a sixth lens and a seventh lens, and the sixth lens is close to one side of the object plane; the sixth lens has a convex object surface side, a concave image surface side, the seventh lens has a convex object surface side, and the image surface side is a convex surface.
This allows the optimum number of lenses and the best image quality while meeting the design requirements.
In the zooming process from low power to high power, the distance between the zooming group and the fixed group is reduced, and the distance between the compensation group and the fixed group is increased. Wherein the distance between the third lens and the fourth lens is kept unchanged in the zooming process; the distance between the sixth lens and the seventh lens is kept constant during the zooming.
The distance D from the image surface side of the seventh lens to the image sensor satisfies the following formula of 60mm < D < 120 mm.
The distance TTL from the object plane side of the first lens to the image sensor satisfies the following formula that TTL is not less than 100mm and not more than 150 mm.
The distance between the barrel mirror and the image rotating prism and the distance between the image rotating prism and the fixed group are adjustable within a certain range so as to match infinite microscope systems of different brands.
In the present invention, in the lens combination with the above-mentioned better effect, the focal length of the first lens is ranged from-30.0 to-20.0 mm, the focal length of the second lens is ranged from 30.0 to 40.0mm, the focal length of the third lens is ranged from 40.0 to 50.0mm, the focal length of the fourth lens is ranged from 35.0 to 45.0mm, the focal length of the fifth lens is ranged from-30.0 to-20.0 mm, the focal length of the sixth lens is ranged from-90.0 to-75.0 mm, and the focal length of the seventh lens is ranged from 45.0 to 55.0 mm.
Further, the focal length value of the first lens ranges from-25.6 mm, the focal length value of the second lens ranges from 35.8mm, the focal length value of the third lens ranges from 44.2mm, the focal length value of the fourth lens ranges from 41.0mm, the focal length value of the fifth lens ranges from-23.3 mm, the focal length value of the sixth lens ranges from-81.9 mm, and the focal length value of the seventh lens ranges from 50.2 mm.
Through changing the fixed group and the distance between the zoom group, the fixed group and the compensation group, the minimum focal length range of the electronic eyepiece adapter is 25-100 mm, and the maximum focal length range is 100-200 mm. The zoom ratio range of the electronic eyepiece adapter is 2 x-8 x. The diameter range of the minimum image circle of the electronic eyepiece adapter on the image sensor is 6-9 mm, and the diameter range of the maximum image circle is 16-24 mm.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model images the infinite light beam emitted by the microscope objective on the image sensor through the lens group, and the processor further processes or stores the infinite light beam to realize the digitization of the microscope image; through changing the fixed group and becoming the interval between the group, fixed group and the compensation group, can realize the function of becoming doubly in succession, need not to change the adapter and just can match the image sensor of equidimension not, still can be applied to the infinity microscope of different brands, realizes maximum commonality.
Drawings
Fig. 1 is a diagram showing an optical system structure of the electronic eyepiece adapter of the present invention;
fig. 2 is a view showing the structure of the optical system of the electronic eyepiece adapter of the present invention at a magnification of 0.35 x, 0.63 x, 0.84 x, 1 x;
fig. 3 is a MTF graph of the electronic eyepiece adapter of the present invention when the magnification is 0.35 ×;
fig. 4 is a MTF graph when the magnification of the electronic eyepiece adapter of the present invention is 0.63 ×;
fig. 5 is a MTF graph when the magnification of the electronic eyepiece adapter of the present invention is 0.84 ×;
fig. 6 is a graph of MTF curve when the magnification of the electronic eyepiece adapter of the present invention is 1 ×;
fig. 7 is a dot-column diagram of the electronic eyepiece adapter of the present invention when the magnification is 0.35 ×;
fig. 8 is a dot-column diagram of the electronic eyepiece adapter of the present invention when the magnification is 0.63 ×;
fig. 9 is a dot-column diagram of the electronic eyepiece adapter of the present invention with a magnification of 0.84 ×;
fig. 10 is a dot array diagram of the electronic eyepiece adapter of the present invention at a magnification of 1 ×.
Detailed Description
The invention will be described in further detail with reference to the following figures and examples, which are intended to facilitate the understanding of the invention without limiting it.
As shown in figure 1, the variable power electronic eyepiece adapter for the infinite conjugate distance microscope is characterized in that a cylindrical lens 2, a relay prism 3, a fixed group 4, a variable power group 5 and a compensation group 6 are sequentially arranged from an objective lens exit pupil 1 to an image sensor 7 along an imaging optical axis, an infinite light beam emitted by a microscope objective lens is imaged on the image sensor 7 through a lens group, and a continuous variable power function can be realized by changing the distance between the fixed group 4 and the variable power group 5 and the distance between the fixed group 4 and the compensation group 6.
In the present embodiment, the fixed group 4 includes a first lens 41 and a second lens 42. The object surface side of the first lens 41 is convex, the image surface side is concave, the object surface side of the second lens 42 is convex, the image surface side is concave, and the first lens 41 and the second lens 42 are cemented together.
The variable power group 5 includes a third lens 51, a fourth lens 52, and a fifth lens 53 in this order from the object plane side. The object surface side of the third lens 51 is convex, and the image surface side is convex; the object plane side of the fourth lens 52 is convex, and the image plane side is convex; the fifth lens 53 has a concave object surface side and a concave image surface side. The fourth lens 52 is close to the object plane, and the fourth lens 52 and the fifth lens 53 are glued together.
The compensation group 6 includes a sixth lens 61 and a seventh lens 62, and the sixth lens 61 is close to the object plane side. The object plane side of the sixth lens 61 is a convex surface, and the image plane side is a concave surface; the seventh lens element 62 has a convex object surface side and a convex image surface side.
The utility model discloses an electronic eyepiece adapter is the continuous zoom system, and the zoom ratio can reach 8 x, and in this embodiment, the distance between third lens 51 and fourth lens 52 keeps 0.1mm unchangeable in the zoom process; the distance between the sixth lens 61 and the seventh lens 62 is kept constant at 21.7mm during the magnification change.
In order to match image sensors with different sizes, the diameter range of an image circle imaged on the image sensor 7 by the adapter is 8.7 mm-17.5 mm.
In order to match the exit pupil of the microscope objective to the entrance pupil of the adapter, the diameter of the entrance pupil of the adapter is designed to be 9.0 mm.
In order to match the numerical aperture of the microscope with the numerical aperture of the adapter, the image-side numerical aperture range of the adapter is 0.031-0.062, and the corresponding focal length range is 73.0 mm-145.0 mm.
The distance from the rear surface of the seventh lens 62 to the image sensor 7 ranges from 25.0mm to 45.9mm from high magnification to low magnification. The distance TTL from the front surface of the first lens 41 to the image sensor 7 is equal to 120.0 mm.
In the present embodiment, the focal length f2 of the barrel mirror 2 is 200.0mm, the focal length f41 of the first lens 41 is-25.6 mm, the focal length f42 of the second lens 42 is 35.8mm, the focal length f51 of the third lens 51 is 44.2mm, the focal length f52 of the fourth lens is 41.0mm, the focal length f53 of the fifth lens is-23.3 mm, the focal length f61 of the sixth lens is-81.9 mm, and the focal length f62 of the seventh lens is 50.2 mm.
As shown in fig. 2, the structure of the optical system of the electronic eyepiece adapter of the present invention at different magnifications is 0.35 x, 0.63 x, 0.84 x, and 1 x from top to bottom in this order. The optical data of the electronic eyepiece adapter at these four magnifications are shown in table 1 below, where the surface numbers in table 1 refer to the sequential reference numbers of each surface from the object plane of the first lens to the image plane of the seventh lens along the optical axis, and table 1 includes: the radius of curvature R of each surface, the thickness of each lens and the separation d between two adjacent surfaces, and the refractive index n of each lens.
TABLE 1
| Number of noodles | Radius of curvature R (mm) | Thickness and spacing d (mm) | |
| 1 | 5360.9 | 4.0 | 1.8 |
| 2 | 20.5 | 4.0 | 1.9 |
| 3 | 57.6 | 36.6/20.7/10.9/6.0 | |
| 4 | 43.2 | 5.0 | 1.7 |
| 5 | -115.7 | 0.1 | |
| 6 | 29.3 | 6.8 | 1.5 |
| 7 | -58.4 | 5.0 | 1.8 |
| 8 | 28.6 | 7.0/31.2/48.2/58.5 | |
| 9 | 157.4 | 4.0 | 1.5 |
| 10 | 33.8 | 21.7 | |
| 11 | 64.6 | 5.0 | 1.8 |
| 12 | -114.8 | 45.9/37.6/30.4/25.0 |
The utility model discloses electron eyepiece adapter magnification continuous variation selects four representative magnifications to carry out image quality analysis. The MTF curves at different magnifications are shown in FIGS. 3-6, and as shown in FIG. 3, the 60 line pair/mm MTF is greater than 0.4 at a magnification of 0.35. As shown in fig. 4, the 60 line pair/mm MTF is greater than 0.39 at a magnification of 0.63 x. As shown in fig. 5, the 60 line pair/mm MTF is greater than 0.34 at a magnification of 0.84 x. As shown in fig. 6, the 60 line pair/mm MTF is greater than 0.27 at a magnification of 1 x. Therefore, the MTF curve of each multiplying power is close to the diffraction limit, and the design has higher contrast.
Under the different multiplying power circumstances, the utility model discloses the point is listed as the chart and is shown in 7-10, and as shown in fig. 7, each visual field point is listed as the chart root mean square scattered spot diameter and all is less than 8.5um when magnification is 0.35 x. As shown in fig. 8, the root mean square diffuse spot diameter of each field-of-view plot is less than 4.8um at a magnification of 0.63 ×. As shown in fig. 9, the root mean square diffuse spot diameter of each field-of-view plot is less than 5.1um at a magnification of 0.84 ×. As shown in fig. 10, the root mean square diffuse spot diameter of each field plot is less than 6.6um at a magnification of 1 ×. The imaging quality is high, and the requirements of an image sensor can be met.
The above-mentioned embodiment is to the technical solution and the beneficial effects of the present invention have been described in detail, it should be understood that the above is only the specific embodiment of the present invention, not used for limiting the present invention, any modification, supplement and equivalent replacement made within the principle scope of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A variable power electronic eyepiece adapter for an infinite conjugate distance microscope is characterized in that a cylindrical lens, a steering prism and a variable power system are sequentially arranged between an exit pupil of a microscope objective and an image sensor, and an infinite light beam emitted by the microscope objective passes through the cylindrical lens, the steering prism and the variable power system and then is imaged on the image sensor;
the zooming system comprises a fixed group, a zooming group and a compensation group which are arranged along an optical axis, and the distance between the fixed group and the zooming group, and the distance between the fixed group and the compensation group are adjustable, so that the continuous zooming function is realized.
2. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 1 wherein the variable power group is disposed between a fixed group and a compensating group, the fixed group being proximate the steering prism and the compensating group being proximate the image sensor;
the focal length value range of the cylindrical mirror is 165.0-200.0 mm, the focal length range of the fixed group is-90-60 mm, the focal length range of the zoom group is 50-70 mm, and the focal length range of the compensation group is 69-90 mm.
3. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 2 wherein the fixed group comprises a first lens and a second lens having a convex object side and a concave image side, the concave surface of the first lens being cemented to the convex surface of the second lens, and the first lens being closer to the object side;
the zoom group comprises a third lens, a fourth lens and a fifth lens, and the third lens is close to one side of the object plane; the object plane sides and the image plane sides of the third lens and the fourth lens are convex surfaces, the object plane side and the image plane side of the fifth lens are concave surfaces, and the convex surface of the fourth lens is glued with the concave surface of the fifth lens;
the compensation group comprises a sixth lens and a seventh lens, and the sixth lens is close to one side of the object plane; the sixth lens has a convex object surface side, a concave image surface side, the seventh lens has a convex object surface side, and the image surface side is a convex surface.
4. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 3 wherein the distance between said third lens and said fourth lens and between said sixth lens and said seventh lens is fixed.
5. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 3 wherein the distance D from the image plane side of said seventh lens to the image sensor satisfies 60 mm. ltoreq. D.ltoreq.120 mm.
6. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 3 wherein TTL, the distance from the object side of said first lens to the image sensor, satisfies 100mm ≦ TTL ≦ 150 mm.
7. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 3 wherein the focal length of the first lens ranges from-30.0 to-20.0 mm, the focal length of the second lens ranges from 30.0 to 40.0mm, the focal length of the third lens ranges from 40.0 to 50.0mm, the focal length of the fourth lens ranges from 35.0 to 45.0mm, the focal length of the fifth lens ranges from-30.0 to-20.0 mm, the focal length of the sixth lens ranges from-90.0 to-75.0 mm, and the focal length of the seventh lens ranges from 45.0 to 55.0 mm.
8. The variable power eyepiece adapter for an infinity conjugate distance microscope according to claim 1 wherein the spacing between the barrel mirror and the relay prism, and between the relay prism and the fixed group is adjustable.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412760A (en) * | 2019-08-21 | 2019-11-05 | 杭州图谱光电科技有限公司 | A kind of zoomable electronic eyepiece adapter of infinity conjugate distance microscope |
| CN113092296A (en) * | 2021-04-08 | 2021-07-09 | 重庆里博仪器有限公司 | Vickers microhardness meter infinite imaging system and binocular microhardness meter |
| CN113219651A (en) * | 2021-05-14 | 2021-08-06 | 湖北大学 | Straight-barrel type combination design method of miniaturized optical microscope |
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2019
- 2019-08-21 CN CN201921362081.4U patent/CN210294681U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110412760A (en) * | 2019-08-21 | 2019-11-05 | 杭州图谱光电科技有限公司 | A kind of zoomable electronic eyepiece adapter of infinity conjugate distance microscope |
| CN113092296A (en) * | 2021-04-08 | 2021-07-09 | 重庆里博仪器有限公司 | Vickers microhardness meter infinite imaging system and binocular microhardness meter |
| CN113219651A (en) * | 2021-05-14 | 2021-08-06 | 湖北大学 | Straight-barrel type combination design method of miniaturized optical microscope |
| CN113219651B (en) * | 2021-05-14 | 2022-05-03 | 湖北大学 | Straight cylinder type combination design method of miniaturized optical microscope |
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